Earth’s surface bears the scars of obvious catastrophes, from dinosaur-killing craters to lava fields, but a growing body of ...

Researchers are keeping an eye on the building-sized asteroid 2024 YR4, which has a 4 percent chance of hitting the moon seven years from now.

Touchdown airbursts are a form of cosmic impact that may happen more often than the well-known, crater-forming events linked to mass extinctions ...

Asteroid 2024 YR4 will not hit Earth, but it has forced planetary defense experts to confront a different kind of worst case: a significant chance that a “city killer” rock could slam into the Moon ...

Researchers have discovered chemical fingerprints of Earth's earliest incarnation, preserved in ancient mantle rocks. A unique imbalance in potassium isotopes points to remnants of “proto Earth” ...